JP2006329560A - Adsorption type refrigerator and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method shortening the manufacturing time of a heat exchanger and reducing cost required for the manufacture in an adsorption type refrigerator, and forming adsorbent coats of uniform thickness on the surfaces of plate fins juxtaposed at narrow spaces on the outer peripheries of heat exchanger tubes by a simple method. <P>SOLUTION: The adsorption type refrigerator comprises the adsorbent heat exchanger formed by juxtaposing a large number of plate fins on the outer peripheries of the heat exchanger tubes through which a refrigerant or a heat medium flows, and mounting solid adsorbents for adsorbing the refrigerant, to the plate fins. The adsorbent heat exchanger comprises a sealed casing 1; an integrated heat exchanger 8 stored in the casing 1 and comprising the large number of plate fins 10 and a plurality of heat exchanger tubes 9 juxtaposed vertically and laterally; and the solid adsorbents covering the surfaces of the plate fins 10 in film shape, wherein a refrigerant vapor passage is formed between the plate fins. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention includes an adsorbent heat exchanger in which a large number of plate fins are arranged in parallel on the outer periphery of a heat transfer tube through which a heat source fluid flows, and a solid adsorbent that adsorbs a refrigerant is attached to the plate fins. An adsorptive refrigerator that generates heat by using the heat generated from the heat source fluid as a heat source by utilizing the heat generation and heat absorption phenomenon associated with the reversible reaction between the solid adsorbent and the refrigerant through the heat source fluid in the heat transfer tube. In addition, regarding the manufacturing method thereof, it is possible to shorten the manufacturing time and the manufacturing cost of the adsorption refrigerator.

Conventionally, by utilizing the property that solid adsorbents such as silica gel, activated carbon, and zeolite adsorb or desorb substances depending on changes in temperature or pressure, for example, under vacuum conditions where refrigerants such as water and alcohol evaporate or condense. 2. Description of the Related Art An adsorption refrigeration machine is known in which a refrigerant is adsorbed and desorbed on an adsorbent by heating or cooling, and a refrigeration effect is obtained by the action at that time.
Zeolite, silica gel, activated carbon or the like is used as the adsorbent, and water, methanol, ammonia or the like can be used as the evaporation medium.

Conventionally, adsorption heat exchangers of adsorption refrigerators employ a method in which an adsorbent is packed between copper tube aluminum fins.
For example, Patent Document 1 (Japanese Patent Laid-Open No. 2-152513) discloses a plate fin heat exchanger type adsorption device used in an adsorption type refrigerator. FIG. 4 is a cross-sectional perspective view of the adsorption device. In FIG. 4, this apparatus includes a plurality of partition plates 01, a heat medium channel 04A formed by the partition plates 01 every other stage, and heat transfer fins provided in the heat medium channel 04A in the same direction as the flow direction. 02A, a processing gas flow path 04B that is 90 ° different from the heat medium flow path 04A, a heat transfer fin 02B provided in the processing gas flow path 04B in the same direction as the flow direction, and the processing gas flow path 04B are filled. It is comprised from the adsorbent 03.

Note that the heat medium flow path 04A and the processing gas flow path 04B are connected to external piping via respective inlet / outlet headers.
Thus, the solid adsorbent is filled in the plurality of process gas flow paths 04B on which the heat transfer fins 02A are mounted.

  Patent Document 2 (Japanese Patent Application Laid-Open No. 2004-263970) discloses an adsorption type refrigerator shown in FIG. In FIG. 5, 011 is an adsorbent heat exchanger of an adsorption refrigerator, and among these, the heat transfer pipe 012 is an outer peripheral surface of a pipe body 013 through which hot water from a hot water supply system or cold water from a cold water supply system flows. Further, a plate-like fin 014 is projected in a V shape along the axial direction of the tube body 013.

A plurality of such heat transfer tubes 012 are arranged in tandem and filled with an adsorbent 015 formed between the heat transfer tubes 012 to form an adsorption element 020. The adsorption element 020 is arranged in the vertical direction (vertical direction). A plurality are arranged side by side.
The refrigerant passage 021 is set in the tube axis direction (A direction) of the heat transfer tube 012 or in the direction perpendicular to the tube axis (B direction).

In Patent Document 3 (Japanese Patent Laid-Open No. 9-189459), in an adsorption refrigeration machine, a large number of plate fins are arranged in parallel on the outer periphery of a heat transfer tube through which a heat source fluid flows, and a refrigerant is supplied to the plate fins. An adsorbent heat exchanger in which an adsorbing solid adsorbent is bonded with an adhesive is disclosed.
In the method of adhering the solid adsorbent to the plate fin, the adsorbent is adhered and fixed when the adhesive applied to the surface of the plate fin is in a so-called semi-dry state.

JP-A-2-152513 JP 2004-263970 A Japanese Patent Laid-Open No. 9-189459

The adsorption device in the conventional adsorption type refrigerator disclosed in Patent Document 1 is to individually fill a plurality of processing gas flow paths 04B with a solid adsorbent, and the filling operation takes time and is difficult to manufacture. The labor cost required is expensive.
6 and 7 are an elevation view and a side view schematically showing a conventional adsorption refrigerator. 6 and 7, a large number of aluminum fins 033 are stretched over copper heat transfer tubes 032 arranged in a row, and aluminum fins 033 are arranged in parallel at intervals, and a solid adsorbent is filled between the aluminum fins 033. The adsorption elements 034 are individually manufactured, and the adsorption elements 034 are placed in a thin plate-like aluminum frame 037 for each row, and the aluminum frame 037 is placed in a sealed casing 031 and on the support frame 035. The refrigerant vapor passage 036 is configured to be stacked while being secured.

As shown in FIGS. 6 and 7, the conventional adsorbent heat exchanger includes the adsorber of Patent Document 1, and a heat exchanger with plate fins is placed in a case for each stage, and a solid adsorbent is provided between the plate fins. Since the manufacturing method of opening the refrigerant vapor passage for each stage of the case and stacking the stages was adopted, it took time and cost.
Also in the adsorption type refrigerator of Patent Document 2, individual adsorption elements 020 are housed in a thin plate-shaped aluminum frame in the refrigerator body, and are individually stacked as shown in FIGS. It was necessary, and it took time and cost to produce it.

  Further, the adsorbent heat exchanger disclosed in Patent Document 3 employs a method of adhering and fixing the adsorbent to the plate fins with an adhesive, but the adhesive is applied to the surface of the plate fins arranged in parallel at a narrow interval. It is extremely difficult to use and adhere the adsorbent to a uniform thickness over the entire surface of the plate fin.

  In view of the problems of the prior art, the present invention aims to reduce the manufacturing time of the heat exchanger and the cost required for the manufacturing in the adsorption refrigerator, and to arrange the plate fins arranged in parallel at a narrow interval on the outer periphery of the heat transfer tube. It is an object of the present invention to realize a production method capable of coating the adsorbent with a uniform thickness on the surface of the substrate.

In order to achieve the above object, the adsorption refrigerator according to the present invention comprises:
Adsorbent heat exchange in which a large number of plate fins are arranged in parallel on the outer periphery of a heat transfer tube through which a heat source fluid of either a cold fluid or a hot fluid flows, and a solid adsorbent that adsorbs a refrigerant is loaded on the plate fin. Equipped with
Using the heat generated by the reversible reaction between the adsorbent and the refrigerant through the heat source fluid in the heat transfer tube in the adsorbent heat exchanger and the heat absorption phenomenon, the heat supplied from the heat source fluid is used as the heat source. In the adsorption refrigerator that generates cold,
The adsorbent heat exchanger is
A sealed housing;
A plurality of plate fins housed in the same housing and arranged in parallel at intervals, and a plurality of the heat transfer tubes inserted in a direction perpendicular to the plate fins and arranged in multiple rows at intervals. A heat exchanger that is integrally formed,
It consists of the solid adsorbent coated on the surface of the plate fin in the form of a film,
A refrigerant vapor passage is formed between the plate fins.

  In the adsorbent heat exchanger of the device of the present invention, in the process of adsorbing the refrigerant vapor by the adsorbent, the adsorbent is cooled by passing the refrigerant through the heat transfer pipe through a refrigerant such as cold water, and the adsorption heat is removed to adsorb the refrigerant vapor. Further, in the process of desorbing the refrigerant vapor from the adsorbent, the refrigerant vapor is desorbed by heating the adsorbent through a heating medium such as warm water to the heat transfer tube to give desorption heat.

Further, the adsorbent heat exchanger of the present invention inserts heat transfer tubes arranged in multiple stages in a perpendicular direction with respect to a large number of plate fins arranged in parallel at intervals from each other inside a sealed casing. The solid adsorbent is coated in the form of a film between the plate fins.
In the adsorbent heat exchanger configured as described above, the refrigerant vapor is adsorbed or desorbed to the solid adsorbent by being cooled or heated by the heat source fluid flowing in the heat transfer tube, but the surface of the plate fin is coated with the solid adsorbent in the form of a film. In addition, since the refrigerant vapor passage is formed between the plate fins, the refrigerant vapor flows through the passage formed between the plate fins, whereby an adsorption reaction or a desorption reaction is performed.

  Further, since the adsorbent heat exchanger is housed in a sealed casing, the casing is provided with an inlet pipe and an outlet pipe for supplying or discharging the heat source fluid to the heat transfer pipe, and supplying or discharging the refrigerant vapor. Inlet and outlet tubes are provided. Preferably, the refrigerant vapor inlet and outlet pipes are oriented in a direction parallel to the plate fins disposed perpendicular to the heat transfer tubes.

Moreover, the manufacturing method of the adsorption refrigeration machine of the present invention,
Adsorbent heat exchange in which a large number of plate fins are arranged in parallel on the outer periphery of a heat transfer tube through which a heat source fluid of either a cold fluid or a hot fluid flows, and a solid adsorbent that adsorbs a refrigerant is loaded on the plate fin. Equipped with
Using the heat generated by the reversible reaction between the adsorbent and the refrigerant through the heat source fluid in the heat transfer tube in the adsorbent heat exchanger, the heat supplied from the heat source fluid is used as a heat source. In the manufacturing method of the adsorption refrigerator that generates
A heat exchanger in which a large number of plate fins arranged in parallel at intervals and a plurality of the heat transfer tubes inserted in a direction perpendicular to the plate fins and arranged in multiple stages at intervals are integrated. Is immersed in a solution containing a particulate adsorbent and a binder and then taken out of the solution and dried to form an adsorbent film on the surface of the plate fin.

In the method of the present invention, a granular adsorbent such as zeolite, silica gel, activated carbon or the like is mixed and stirred with a solution containing a binder, and a plate fin and a heat exchanger tube-integrated heat exchanger are immersed in the solution to deposit the solution. Then, the adsorbent film is formed on the surface of the plate fin by taking out the solution and drying it.
Zeolite, silica gel, activated carbon and the like are also used as pigments having a rust-preventing effect, have good intimacy with the binder, and have good adhesion by being mixed and stirred with the solvent containing the binder by the method of the present invention. The present inventors pay attention to this finding, and the adsorbent is firmly attached to the surface of the plate fin by coating the plate fin by mixing and stirring with a solvent containing a binder and, if necessary, water or an oily diluent. It is made to adhere to.
For example, an epoxy resin binder is used as the binder.

  According to the apparatus of the present invention, the adsorbent heat exchanger includes a sealed housing, a large number of plate fins housed in the housing and arranged in parallel at intervals, and the plate fins. A heat exchanger in which a plurality of heat transfer tubes that are inserted in a perpendicular direction at intervals and arranged in parallel at multiple stages are integrally formed, and a solid adsorbent that is coated on the surface of the plate fin in a film form By forming a refrigerant vapor passage between the plate fins, the refrigerant vapor flows through the refrigerant vapor passage, reaches the adsorbent, and is adsorbed or desorbed.

  Therefore, like the above-described conventional adsorbent heat exchanger, the adsorption elements 034 composed of heat transfer tubes with plate fins are placed in a thin plate-like aluminum frame 037 for each row, and a refrigerant vapor passage 036 is formed between the support frames on each other. Since there is no need to stack while securing, the adsorbent heat exchanger is manufactured in advance and then stored inside the sealed housing, so the manufacturing time is greatly reduced and the manufacturing cost is greatly reduced. be able to.

  In addition, as shown in FIGS. 5 and 6, the adsorption elements 034 are placed in a thin plate-like aluminum frame 037 for each row and filled with a solid adsorbent. However, in the present invention, an integrally formed heat exchanger is used. Since the solid adsorbent can be applied to the surfaces of all the plate fins at once, the production time and labor costs can be greatly reduced.

  Preferably, the refrigerant vapor is directed to the plate fin by directing the refrigerant vapor inlet and outlet pipes provided in the partition wall of the hermetic casing in a direction parallel to the plate fins disposed perpendicular to the heat transfer pipe. There is an advantage that it can be smoothly introduced into the gap between them.

  Further, according to the method of the present invention, there are a large number of plate fins arranged in parallel at intervals, and a plurality of heat transfer tubes that are inserted in a direction perpendicular to the plate fins and arranged in multiple stages at intervals. An integrated heat exchanger is immersed in a solution containing a particulate adsorbent and a binder, and then removed from the solution and dried to form an adsorbent film on the surface of the plate fin. An adsorbent with a uniform thickness can be easily adhered to the entire surface of the plate fins arranged side by side with a gap. Further, since it is deposited by the binder, the adsorbent does not fall off and a strong adhesive force can be provided.

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this example are not intended to limit the scope of the present invention only to specific examples unless otherwise specified. Only.
FIG. 1 is an elevational sectional view of a first embodiment of the apparatus of the present invention, FIG. 2 is a sectional plan view of the first embodiment, and FIG. 3 is a manufacturing process of an adsorbent heat exchanger in the first embodiment. It is process drawing shown.

1 and 2, reference numeral 1 denotes a casing that can be sealed and contains an adsorbent heat exchanger 6 therein. An inlet pipe 3 to which a refrigerant vapor r is supplied is provided on one side wall 2 of the casing 1. In addition, the side wall 4 facing the side wall 2 is provided with an outlet pipe 5 through which the refrigerant vapor r is discharged.
Reference numeral 6 denotes a bottom plate constituting the bottom surface of the casing 1. A support bar 7 is attached on the bottom plate 6, and an adsorbent heat exchanger 8 is placed and fixed on the support bar 7.

The adsorbent heat exchanger 8 is integrally composed of a copper heat transfer tube 9 formed in a meandering manner on a horizontal plane and an aluminum plate fin 10 arranged perpendicular to the tube axis direction of the heat transfer tube 9. Thus, the heat transfer tube 9 is inserted through a large number of plate fins 10 arranged in parallel at intervals to each other in a direction perpendicular to the tube axis, and a plurality of heat transfer tubes 9 are arranged in multiple stages vertically.
The plate fins 10 are erected in the vertical direction at intervals inside the casing 1, and a solid adsorbent (not shown) is coated on the surface thereof in the form of a thin film.

  FIG. 3 shows a process of coating the surface of the plate fin 10 with a solid adsorbent in a film form. In the present embodiment, for example, zeolite having a diameter of 10 μm is used as the adsorbent, and the installation interval of the plate fins 10 is 2 mm. As shown in FIG. 3, a heat exchanger 8 in which a large number of heat transfer tubes 9 and a large number of plate fins 10 are integrally manufactured is filled with a solution 11 obtained by mixing and stirring granular zeolite, an epoxy resin binder, an oily diluent, and the like. The adsorbent heat exchanger 8 is manufactured by dipping in the dipping bath 10 and then taking it out and drying it by the drying step 13 by a method such as heat drying or natural drying.

  The adsorbent heat exchanger 8 is integrally configured as described above, and the inlet pipe 3 and outlet pipe 5 of the refrigerant vapor r are arranged in the direction parallel to the plate fins 10 with respect to the side walls 2 and 4 of the casing 1. r is provided to be supplied or discharged.

  In the apparatus of the first embodiment, a refrigerant medium such as cold water or a heating medium such as hot water is supplied to the heat transfer pipe 9 from an inlet portion 9a provided penetrating the partition wall of the casing 1 to thereby form the inlet pipe. 3, an adsorption reaction and a desorption reaction are repeatedly caused between the refrigerant vapor r supplied into the casing 1 from the inside of the casing 1 and the solid adsorbent coated on the plate fin 10, and the adsorption process of the refrigerant vapor r on the solid adsorbent and Repeat the desorption process.

  According to the first embodiment, the adsorbent heat exchanger 8 is integrally configured, and the refrigerant vapor r flows through the passages formed between the plate fins 10 arranged in parallel at a distance from each other. Since the adsorption reaction or desorption reaction with respect to the adsorbent is performed, it is necessary to manufacture the adsorption elements composed of heat transfer tubes with plate fins separately for each row in order to secure the refrigerant vapor passage as in the above-described conventional apparatus. Disappear.

Further, a solid adsorbent is coated on the plate fin 10 in a film form by immersing a heat exchanger 8 in which a large number of heat transfer tubes 9 and a large number of plate fins 10 are integrally manufactured in an immersion tank 10 filled with a solution 11. As a result, the solid adsorbent coating process is completed in a single step, and the work of filling the solid adsorbents one by one into the adsorbing elements manufactured for each row in order to secure the refrigerant vapor passage as in the prior art is reduced. be able to.
As described above, the apparatus of the first embodiment can significantly reduce the production time as compared with the conventional method for producing the adsorbent heat exchanger, and thus can greatly reduce the production cost.

  Further, since the interval between the plate fins 10 is 2 mm and the particle size of the zeolite as the adsorbent is 10 μm, the zeolite can easily enter the gaps between the plate fins 10, so that the entire surface of the plate fins 10 is uniform. A thick adsorbent coating can be formed. Moreover, a good antirust film can be firmly formed by the antirust property inherent in zelite.

  In the first embodiment, the inlet pipe 3 and the outlet pipe 5 for introducing the refrigerant vapor r into the casing 1 are arranged in parallel with the arrangement direction of the plate fins 10 arranged in the casing 1. There is an advantage that the introduction of the steam r into the gap formed between the plate fins 10 and the discharge from the casing 1 through the gap are smoothly performed.

  According to the present invention, since the adsorbent heat exchanger can be manufactured integrally in the adsorption refrigerator, the production time and production cost of the adsorption refrigerator can be greatly increased without deteriorating the refrigeration capacity. It is possible to achieve an adsorption refrigerator that can reduce the amount and form an adsorbent coating film having an antirust effect.

It is an elevational sectional view of the first embodiment of the device of the present invention. It is a plane sectional view of the 1st example. It is process drawing which shows the manufacture process of the adsorbent heat exchanger of the said 1st Example. It is a section perspective view of the conventional adsorption device indicated by patent documents 1. It is sectional drawing of the conventional adsorption | suction apparatus disclosed by patent document 2. It is a side view which shows typically another conventional adsorption | suction type refrigerator. It is a side view which shows typically the conventional adsorption type refrigerator of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Casing 2, 4 Side wall 3 Refrigerant evaporation inlet pipe 5 Refrigerant evaporation outlet pipe 6 Bottom plate 7 Support rod 8 Adsorbent heat exchanger 9 Heat transfer pipe 10 Plate fin 11 Solution 12 Immersion tank 13 Drying process

Claims (3)

Adsorbent heat exchange in which a large number of plate fins are arranged in parallel on the outer periphery of a heat transfer tube through which a heat source fluid of either a cold fluid or a hot fluid flows, and a solid adsorbent that adsorbs a refrigerant is loaded on the plate fin. Equipped with
Using the heat generated by the reversible reaction between the adsorbent and the refrigerant through the heat source fluid in the heat transfer tube in the adsorbent heat exchanger, the heat supplied from the heat source fluid is used as a heat source. In the adsorption refrigerator that generates
The adsorbent heat exchanger is
A sealed housing;
A plurality of plate fins housed in the same housing and arranged in parallel at intervals, and a plurality of the heat transfer tubes inserted in a direction perpendicular to the plate fins and arranged in multiple rows at intervals. A heat exchanger that is integrally formed,
It consists of the solid adsorbent coated on the surface of the plate fin in the form of a film,
An adsorption refrigerator having a refrigerant vapor passage formed between the plate fins. Provided on the partition wall of the housing with an inlet pipe for supplying the heat source fluid to the heat transfer pipe and an outlet pipe for the heat source fluid discharged from the heat transfer pipe,
The adsorption type refrigerator according to claim 1, wherein an inlet pipe and an outlet pipe for supplying or discharging refrigerant vapor in a direction perpendicular to the heat transfer pipe are provided on the partition wall of the casing. Adsorbent heat exchange in which a large number of plate fins are arranged in parallel on the outer periphery of a heat transfer tube through which a heat source fluid of either a cold fluid or a hot fluid flows, and a solid adsorbent that adsorbs a refrigerant is loaded on the plate fin. Equipped with
Using the heat generated by the reversible reaction between the adsorbent and the refrigerant through the heat source fluid in the heat transfer tube in the adsorbent heat exchanger, the heat supplied from the heat source fluid is used as a heat source. In the manufacturing method of the adsorption refrigerator that generates
A heat exchanger in which a large number of plate fins arranged in parallel at intervals and a plurality of the heat transfer tubes inserted in a direction perpendicular to the plate fins and arranged in multiple stages at intervals are integrated. Is immersed in a solution containing a particulate adsorbent and a binder, and then is taken out from the solution and dried to form an adsorbent coating on the surface of the plate fin. .

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